function add(x: number, y: number): number {
  return x + y
}

const minus = (x: number, y: number): number => {
  return x - y
}

const z = 'hello'

class AAA {
  name: string = 'aaa'
  sayName() {
    console.log(this.name)
  }
}

export default AAA

export {
  add,
  minus,
  z
}